Dutch Student Team Aims To Launch Rocket to 50KM

Space. The final frontier. These are the voyages of DARE, the [Delft Aerospace Rocket Engineering] team, who are looking to launch a rocket to 50 kilometers (about 31 miles) to break the European amateur rocketry record later this year.

This brave crew of students from the Delft Technical University is boldly going where no European amateur has gone before with a rocket of their own design called Stratos II, a single stage hybrid rocket which is driven by a DHX-200 Aurora engine. This self-built engine uses a combination of solid Sorbitol and candlewax fuel, with liquid Nitrous Oxide as the oxidizer. The rather unlikely sounding combination should produce an impressive 12,000 Newtons of maximum thrust, and a total of 180,000 Ns of impulse. It’s difficult to make a proper comparison, but the largest model rocket motor sold in the US without a special license (a class G) has up to 160 Ns of impulse and the largest engine ever built by amateurs had 411,145 Ns of impulse.

The team did try a launch last year, but the launch failed due to a frozen fuel valve. Like any good engineering team, they haven’t let failure get them down, and have been busy redesigning their rocket for another launch attempt in the middle of October, Their launch window begins on October 13th at a military base in southern Spain, and we will be watching their attempt closely. Godspeed, DARE!

In commercial space news, yesterday NASA tested the RS-25 engine that will be used in the Space Launch System — the rocket it’s developing to take astronauts to the moon and mars. Also, the NTSB report on the tragic crash of SpaceShipTwo was released a few weeks ago. The report found that the feather mechanism was unlocked by the copilot at the wrong time, leading to the crash. Future system improvements will be put in place to ensure this doesn’t happen again.

Update – The Stratos II is a single-stage rocket, not a two-stage, as an earlier version of this article described. 8/16/15

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Ask Hackaday: Quadcopter in Near Space?

Your mission, should you choose to accept it, is to send a quadcopter to near space and return it safely to the Earth. Getting it there is not that difficult. In fact, you can get pretty much anything you want to near space with a high altitude weather balloon. Getting it back on the ground in one piece is a whole other ballgame.

Why does someone need to do this? Well, it appears the ESA’s StarTiger team is taking a card out of NASA’s book and wants to use a Sky Crane to soft land a rover on Mars. But instead of using rockets to hold the crane steady in the Martian sky, they want to use…you guessed it, a quadcopter. They’re calling it the Dropter.

quadcopter on mars

At first glance, there seems to be a lot wrong with this approach. The atmosphere on Mars is about 100 times less dense than the Earth’s atmosphere at sea level. How do props operate in these conditions? Testing would need to be done of course, and the Earth’s upper atmosphere is the perfect place to carry out such testing. At 100,000 feet, the density of the stratosphere is about the same as that of the Martian surface atmosphere. AND 100,000 feet is prime high altitude balloon territory.  Not to mention the gravity on Mars is about 38% of Earth’s gravity, meaning a 5.5 pound model on Earth could accurately represent a 15 pound model on Mars.

With all of these facts taken into consideration, one can conclude that realistic testing of a scale model Martian quadcopter is within the grasp of the hacker community. We’ve seen some work on high altitude drones before, but never a quadcopter.

Now it’s your turn to do something no one has ever done before. Think you got what it takes to pull such a project off? Let us know what your approach to the challenge would be in the comments.

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Rocket Controls Fit for a Kerbal

Kerbal Space Program is a space simulation game. You design spacecraft for a fictional race called Kerbals, then blast those brave Kerbals into space. Sometimes they don’t make it home.

If controlling spacecraft with your WASD keys isn’t immersive enough for you, [marzubus] has created a fully featured KSP control console. It sports a joystick, multiple displays, and an array of buttons and switches for all your flight control needs. The console was built using a modular approach, so different controls can be swapped in and out as needed.

Under the hood, three Arduinos provide the interface between the game and the controls. One Arduino Mega runs HoodLoader2 to provide joystick data over HID. A second Mega uses KSPSerialIO to communicate with the game over a standard COM port interface. Finally, a Due interfaces with the displays, which provide information on the current status of your spacecraft.

All of the parts are housed in an off the shelf enclosure, which has a certain Apollo Mission Control feel to it. All [marzubus] needs now is a white vest with a Kerbal badge on it.

First Ever Parts Emailed to Space

The shocking thing is not that this happened. The shocking thing is how normal it seems. An astronaut inside a space station needed a ratcheting socket wrench. Someone else on Earth drew it up on a computer then e-mailed the astronaut. The astronaut clicked a button and then the tool was squirted out of a nozzle. Then he picked up and used the tool for the job he needed done. No big deal.

The story itself is almost uneventful – of course we can do these things now. Sure, it happens to be the first time in mankind’s history we have done this. Yes, it is revolutionary to be able to create tools on demand rather than wait months for one to be built planet-side and put onto the next resupply rocket. But, amateurs living in places without even widespread electricity or running water have already built these machines from actual garbage.

Every once in a while a story slaps us with how much the future is now.

These particular 3d prints were duplicated on the ground, and both sets preserved for future comparative analysis to see if microgravity has any effect on 3d prints. They have an eye on sending them to Mars, a journey where resupply is more than just a couple-month inconvenience.

See the first link above for more detail and photos of NASA’s 3d printer and the Microgravity Science Glovebox in the Columbus laboratory module.

Prints In Space (Said In “Pigs In Space” Voice)

3D Printing on Earth is soooo last year. Recently, NASA has sent a 3D Printer to the International Space Station in order to test printing capability in space. The agency’s ultimate goal is to have a means to make parts and tools for astronauts that are far away from earth.

So, why should NASA have all of the extra-terrestrial printing fun? Three 15 year-olds thought that same thing and decided to build their own space printer. It’s goal, however, is a bit different from the one on the ISS. This printer is made to print on other celestial bodies such as the moon or Mars, not in a space station. The students call their project the DELTA 3 and as its name implies, is a delta-style printer and that’s where all similarities with conventional printers end. This printer has tank tracks so that it can maneuver itself around the planet. There is no print bed. The printer prints directly to the surface of which it is resting on. The frame is open at the front of the printer so that it can back up leaving a free-standing print in its wake. It certainly beats the hot-glue versions seen before and we think this is the Automated Build Platform of the future, today!

The DELTA 3’s electronic controls are also quite different from the norm. There is a Lego EV3 controller that is responsible for navigating the printer around obstacles to find a suitable print area. Once a location has been picked out, the EV3 triggers the standard Arduino Mega/RAMPS combo to coordinate the printing.

The young creators brought their DELTA 3 to the World Robot Olympiad just last month. They came in 4th in their division.

[via 3Dprint.com]



Astrophotography and Data-Analysis Sense Exoplanets

[David Schneider] was reading about recent discoveries of exoplanets. Simply put these are planets orbiting stars other than the sun. The rigs used by the research scientists include massive telescopes, but the fact that they’re using CCD sensors led [David] to wonder if a version of this could be done on the cheap in the backyard. The answer is yes. By capturing and processing data from a barn door tracker he was able to verify a known exoplanet.

Barn Door trackers are devices used to move a camera to compensate for the turning of the earth. This is necessary when taking images throughout the night, as the stars will not remain “stationary” to the camera’s frame without it. The good news is that they’re simple to build, we’ve seen a few over the years.

Other than having to wait until his part of the earth was pointed in the correct direction (on a clear night) at the same time as an exoplanet transit, [David] was ready to harvest all the data he needed. This part gets interesting really quickly. The camera needed to catch the planet passing in between the earth and the star it revolves around (called a transit). The data to prove this happened is really subtle. To uncover it [David] needed to control the data set for atmospheric changes by referencing several other stars. From there he focused on the data for the transit target and compared points across the entire set of captured images. The result is a dip in brightness that matches the specifications of the original discovery.

[David] explains the entire process in the clip after the break.

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Hackaday 10th Anniversary: Hacking Your Way To NASA

[Steve] drives spacecraft for a living. As an engineer at the Jet Propulsion Laboratory, he’s guided probes to comets, asteroids, Mars, and Jupiter, figured out what happens when telemetry from these probes starts looking weird, and fills the role of the Space Hippy whenever NASA needs some unofficial PR.

Like most people who are impossibly cool, [Steve]’s career isn’t something he actively pursued since childhood. Rather, it’s something that fell in his lap. With qualifications like building a robotic computer to typewriter interface, a custom in-car navigation system in the late 80s, and a lot of work with an Amiga, we can see where [Steve] got his skills.

The earliest ‘hack’ [Steve] can remember was just that – an ugly, poorly welded sidecar for his bicycle made in his early teens. From there, he graduated to Lasertag landmines, Tesla coils, and building camera rigs, including a little bit of work on Octopussy, and a rig for a Miata. It helps when your dad is a cinematographer, it seems.

In college, [Steve] used his experience with 6502 assembler to create one of the first computerized lighting controllers (pre-DMX). After reading a biography on [Buzz Aldrin], [Steve] realized doing his thesis on orbital rendezvous would at least be interesting, if not an exceptionally good way to get the attention of NASA.

Around this time, [Steve] ran into an engineering firm that was developing, ‘something like Mathematica’ for the Apple II, and knowing 6502 assembly got him in the door. This company was also working to get the GPS constellation up and running, and [Steve]’s thesis on orbital mechanics eventually got him a job at JPL.

There’s several lifetimes worth of hacks and builds [Steve] went over at the end of his talk. The highlights include a C64 navigation system for a VW bug, a water drop high voltage machine, and a video editing system built from a few optical encoders. This experience with hacking and modding has served him well at work, too: when the star sensor for Deep Space 1 failed, [Steve] and his coworkers used the science camera as a stand in navigation aid.

One final note: Yes, I asked [Steve] if he played Kerbal Space Program. He’s heard of it, but hasn’t spent much time in it. He was impressed with it, though, and we’ll get a video of him flying around the Jool system eventually.